diff --git a/mix.exs b/mix.exs
index 5c7479e..0fe671b 100644
--- a/mix.exs
+++ b/mix.exs
@@ -59,7 +59,7 @@ defmodule ElixirExploration.MixProject do
       {:gettext, "~> 0.19"},
       {:jason, "~> 1.3"},
       {:plug_cowboy, "~> 2.5"},
-      {:argon2_elixir, "~> 3.0"},
+      {:argon2_elixir, "~> 4.0"},
       {:absinthe_plug, "~> 1.5"},
       {:ex_aws, "~> 2.2"},
       {:ex_aws_s3, "~> 2.3"},
diff --git a/mix.lock b/mix.lock
index b7daa45..a807a1f 100644
--- a/mix.lock
+++ b/mix.lock
@@ -3,9 +3,9 @@
   "absinthe_error_payload": {:hex, :absinthe_error_payload, "1.1.4", "502ff239148c8deaac028ddb600d6502d5be68d24fece0c93f4c3cf7e74c1a4d", [:make, :mix], [{:absinthe, "~> 1.3", [hex: :absinthe, repo: "hexpm", optional: false]}, {:ecto, "~> 3.1", [hex: :ecto, repo: "hexpm", optional: false]}], "hexpm", "9e262ef2fd4a2c644075e0cdde2573b1f713c0676ab905c8640eaa8a882b2aca"},
   "absinthe_phoenix": {:hex, :absinthe_phoenix, "2.0.1", "112cb3468db2748a85bd8bd3f4d6d33f37408a96cb170077026ace96ddb1bab2", [:mix], [{:absinthe, "~> 1.5", [hex: :absinthe, repo: "hexpm", optional: false]}, {:absinthe_plug, "~> 1.5", [hex: :absinthe_plug, repo: "hexpm", optional: false]}, {:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:phoenix, "~> 1.5", [hex: :phoenix, repo: "hexpm", optional: false]}, {:phoenix_html, "~> 2.13", [hex: :phoenix_html, repo: "hexpm", optional: true]}, {:phoenix_pubsub, "~> 2.0", [hex: :phoenix_pubsub, repo: "hexpm", optional: false]}], "hexpm", "e773adc876fbc84fb05a82e125d9c263f129520b36e5576554ffcb8cf49db445"},
   "absinthe_plug": {:hex, :absinthe_plug, "1.5.8", "38d230641ba9dca8f72f1fed2dfc8abd53b3907d1996363da32434ab6ee5d6ab", [:mix], [{:absinthe, "~> 1.5", [hex: :absinthe, repo: "hexpm", optional: false]}, {:plug, "~> 1.4", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "bbb04176647b735828861e7b2705465e53e2cf54ccf5a73ddd1ebd855f996e5a"},
-  "argon2_elixir": {:hex, :argon2_elixir, "3.2.1", "f47740bf9f2a39ffef79ba48eb25dea2ee37bcc7eadf91d49615591d1a6fce1a", [:make, :mix], [{:comeonin, "~> 5.3", [hex: :comeonin, repo: "hexpm", optional: false]}, {:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "a813b78217394530b5fcf4c8070feee43df03ffef938d044019169c766315690"},
+  "argon2_elixir": {:hex, :argon2_elixir, "4.0.0", "7f6cd2e4a93a37f61d58a367d82f830ad9527082ff3c820b8197a8a736648941", [:make, :mix], [{:comeonin, "~> 5.3", [hex: :comeonin, repo: "hexpm", optional: false]}, {:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "f9da27cf060c9ea61b1bd47837a28d7e48a8f6fa13a745e252556c14f9132c7f"},
   "bcrypt_elixir": {:hex, :bcrypt_elixir, "3.1.0", "0b110a9a6c619b19a7f73fa3004aa11d6e719a67e672d1633dc36b6b2290a0f7", [:make, :mix], [{:comeonin, "~> 5.3", [hex: :comeonin, repo: "hexpm", optional: false]}, {:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "2ad2acb5a8bc049e8d5aa267802631912bb80d5f4110a178ae7999e69dca1bf7"},
-  "castore": {:hex, :castore, "1.0.3", "7130ba6d24c8424014194676d608cb989f62ef8039efd50ff4b3f33286d06db8", [:mix], [], "hexpm", "680ab01ef5d15b161ed6a95449fac5c6b8f60055677a8e79acf01b27baa4390b"},
+  "castore": {:hex, :castore, "1.0.4", "ff4d0fb2e6411c0479b1d965a814ea6d00e51eb2f58697446e9c41a97d940b28", [:mix], [], "hexpm", "9418c1b8144e11656f0be99943db4caf04612e3eaecefb5dae9a2a87565584f8"},
   "certifi": {:hex, :certifi, "2.12.0", "2d1cca2ec95f59643862af91f001478c9863c2ac9cb6e2f89780bfd8de987329", [:rebar3], [], "hexpm", "ee68d85df22e554040cdb4be100f33873ac6051387baf6a8f6ce82272340ff1c"},
   "comeonin": {:hex, :comeonin, "5.4.0", "246a56ca3f41d404380fc6465650ddaa532c7f98be4bda1b4656b3a37cc13abe", [:mix], [], "hexpm", "796393a9e50d01999d56b7b8420ab0481a7538d0caf80919da493b4a6e51faf1"},
   "connection": {:hex, :connection, "1.1.0", "ff2a49c4b75b6fb3e674bfc5536451607270aac754ffd1bdfe175abe4a6d7a68", [:mix], [], "hexpm", "722c1eb0a418fbe91ba7bd59a47e28008a189d47e37e0e7bb85585a016b2869c"},